Nut-making machine



(No Model.) 4 Sheets-Sheet 1.

. G. DUNHAM.

NUT MAKING MACHINE.

Patented Oct. 30, 1888.

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2%, Z i W N PETERS. Pholn-Lilhognphcn Washington, D c

(No Model.) 4 SheetsSheet 2. G. DUNHAM.

NUT MAKING MACHINE. No. 391,951. Patented-0013.80, 1888.

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(No Model.) 4 Sheets-Shee:t 3. n G. DUNHAM.

NUT MAKING MACHINE.

Patented Oct. 30. 1888.

a: Ir 1 (No Model.) 4 Sheets-Sheet 4. G. DUNHAM.

. NUT MAKING MAGHINE.

No. 391,951. Patented Oct. 80, 1888.

Ill/A Z I II 4 VV/Yfig5555, Ame/1mm Nv PETERS, FhclvLilhographen Washingtonv D. C,

Urrnn resent GEORGE DUNHAM, OF UNIONVILLE, CONNECTICUT, ASSIGNOR TO GEORGE M. DUN HAM, OF WEST NEYVTON, PENNSYLVANIA.

NUT-MAKING MACHINE.

.BPECIPICATION forming part of Letters Patent No. 391,951, dated October 330, 1888.

Application filed March 8, 1888. Serial No. 266,540. (No model.)

.T all whom it may concern:

Be it known that 1, GEORGE DUNHAM, a citizen of the United States, residing at Unionville, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Nut Machines, of which the following is a specification.

My invention relates to improvements in machines for making nuts, washers, or analogous articles; and the objects of my improvement are to improve the efficiency of the machine, particularly the manner of holding the bar, clearing the scrap from the dies, and holding and gaging the nut-blanks.

In the accompanying'drawings, Figure 1 is front elevation of my machine. Fig. 2 is a horizontal section of said machine on line 00 0c ofFig. 1 with one holdingcap and other parts removed. Fig. 3 is a side elevation ofmy ma- 2o chine with the drivingshaft in section. Fig. 4 is an enlarged vertical section of a portion ofsaid machine on lineyy ofFig. 2. Fig. 5 is a vertical section of a portion of said machine on the line .2 ofFig. 4. Fig. 6 is aplan view of the devices for holding thebar, the plate or cap to which they are attached being indicated by broken lines. said devices for holding the bar and the plate to which they are attached. Fig. 8 is ahorizontal section on line w of Fig. 9 of the slide which carries the punches, together with a portion of the frame. Fig. 9 is a side elevation of said slide with a vertical section of a portion of the frame; and Fig. 10 isa plan View, on a still larger scale, of the several dies and connected parts.

The machine herein illustrated and described is an improved form ofthe nut-machine shown and described in the application of George M. Dunham, Serial No. 241,156, filed June 13, 1887.

The slide A, bearing a round punch, 1, Fig. 9, a blanking-punch, 2, and two trimmingpunches, 3, is reeiproeated in suitable ways by a crank or eccentric on the main shaft B, as in ordinary nut-machines. A die-bed, C, containsastationary shear-blade, 4., Figs. 4, 5, and 10, for acting against one side of the blankingpunch 2, the round die a, Fig. 2, for the punch 50 1, two trimming-dies, 5 5, for the trimmingpunches 3 3, and acrowning-die, 6,which acts Fig. 7 is a rear elevation of in opposition to the blanking'punch 2. Moving transversely over the face of the die-bed is the carrieror transferD, containing two rightangular notches, the side wall of which, that is parallel to the shear-blade 4, acts in opposition to said blade for severing the blank from the bar under the action of the punch 2. The side walls of the notches, which are at right angles to the blade 1 and which formthcmiddie projection of said carrier D,serve to carry the nut-blank to the right or to the left, to present said blank to the trimming-dies 5 5. This carrier D may be reciprocated by any suitable mechanism; but I prefer to opcrateit by means of the slides 7 7 and their cams 8 8, as more fully shown and described in my patent of January '24, 1888, No. 376,769, for a mechanical movement. These parts are all substantially as shown and described in the aforesaid application and patent, and therefore I consider it unnecessary to describe them more specifically, excepting as they may be referred to in connection with my improvements. 7 5

The lower end of the slide A, I mount in horizontal ways 9 9, Figs. 1 and 9, so as to make the punches move bodily toward and from the front by means ofthe adj listing-screws 1O 10 and 12 12, Figs. 8 and 9. I also attach Sc this lower part of the slide A to the upper part by means of the bolts 11 11, Figs. 1 and 9, which bolts pass through slots, as indicated by the broken lines in Fig. 1.. Upon each side of the lower part of the slide are laterallyadjusting screws 13 13, passing through lugs on the main portion of the slide, as shown,whereby I am enabled to adjust the lower endof the slide laterally, when the bolts 11 11 are loosened. Thus it will be seen that I am enabled go to adjust all of the punches bodily to and from the front and laterally to either side.

E designates a holding cap or plate or takeoff through which the round punch 1 passes, and underneath which is a groove or channel 5 through which the bar is fed for feeding the dies. Projecting from the front edge .of this plate there are two wings, b, beveled at their front end, and underneath which the cutting portions of the carrier D reciprocate.

of these wings I arrange a pair of holdingjaws, c c, saidjaws being pivoted to the plate Back E and pressed apart at their rear end by the spring (1, whereby their front ends are continually pressed against the sides of the bar to hold it firmly as well as to center and guide it.

The round hole for the center of the nut is first pressed, and then as the bar is fed along to a position over the crowningdie 6 a blank is severed therefrom by means of the blanking-punch 2 acting against the blade 4 upon one side and the parallel wall of the notch in the carrier D on the other side, so as to cut a blank from the bar and trim a slight portion from its outer end. That portion of the carricrD which, in connection with the shearblade 4, acts as a blanking-die, is also further recessed, as at ff. (Shown most clearly in Fig. 10.) In cutting the blank a small por tion of the metal enters the recess f, and there by prevents the blank from jumping laterally away from the central projection on the carrier. Upon the further descent of the blanking-punch the under side of thenut is crowned in the crowningdie 6, and as the blankingpunch retreats the carrier D moves to one side to present the nutblank to one of the trimming-dies 5. In thus passing to the trimmingdie any scrap that may be on the top of the carrier is forced against the beveled end of one the wings I), and by it is pushed toward the front of the machine. \Vhen the carrier presents a blank to the trimming dies 5, said blanks are stopped by the side gages, 9. These side gages are loosely held in place by screws passing through slots and pressed or held in position by the springs h, thereby permitting said side gages to yield and move out of the Way in case a nut-blank of an extraordinary width is presented. The inward movement of these side gages is limited and regulated by means of the screw-pin k, Fig. 4, the ends of which strike against stop-shoulders on thediebed 0. When the trimming-punch descends to trim the blank and returns, the projection that filled or partially filled the recess f is trimmed off as scrap, and the carrier moves back out of the way.

In connection with the trimmingdies 5, I

arrange clearers m, which pass through slots or ways in the die-bed O to the rear of the machine, where they are connected by a rocking arm, a, to the rock-shaft 0. This rockshaft is operated to work the clearers by means of cam F acting upon lever G, and which in turn acts upon the arm g of the rock-shaft, said arm being pressed in the opposite direction by means of the spring r. These clearers are by this mechanism reciprocated over the face of the trimming-dies to remove the scrap immediately after the trimming of each blank.

I have shown two blanking-dies and a carrier which takes a blank in both directions; but my clearers for the trimming-die may, if desired, be used in connection with a singleacting machine having only one finishing-die. This will require only the omission of the extra pinion for driving the slides 7 7 that reciprocate the carrier and placing the operating-cams for said slides directly upon the main shaft, so that the carrier will then receive one reciprocating movement for every revolution of the shaft 13. As illustrated, for a double acting machine there is only one reciprocation of the carrier for every revolution of the shaft B.

While I have shown my improvement as applied to a certain nut-machine, I intend to apply such of myimprovements as are adapted therefor to other nut-machines or machines for making washers or other analogous articles.

I claim as my invention- 1. In a nut-machine, the slide A, having its lower end adapted to hold several punches and made separately from the main or upper portion of said slide, and provided with adjusting devices for adjusting the punches bod ily to or from the front and rear, and also laterally, substantially as described, and for the purpose specified.

2. In a nut-inachine having a groove or way for the rod or bar to pass through, the combination of the jaws c c, pivoted to the plate E upon each side of said way, and the spring (1 for pressing said jaws against opposite sides of the bar when passing through said ways, substantially as described, and for the purpose specified.

3. In a nut-machine, the combination of the blanking punch and dies, one member of said dies being formed on the reciprocating carrier, and the stationary Wing b, beveled at its outer end, substantially as described, whereby the movement of the carrier under said wing frees the dies from scrap, as set forth.

4. In a nut-machine, the combination, with the blanking-punch, of the shear-blade 4, and the reciprocating carrier having an edge parallel to that of said shear-blade and in connection therewith serving as the blanking-die, said parallel edge having also the holding-recess f, substantially as described, and for the purpose specified.

5. In a nut-maehine, the combination of the blanking punch and die, the trimming die and punch, a carrier for transferring the blank from the blanking to the trimming dies, and

the yielding gage g, substantially as described, and for the purpose specified.

6. In a machine of the class hereinbeforc specified, the combination of the punchingdie and punch for the middle hole, the blanking die and punch, a carrier, a trimming die and punch, and a clearer, m, for removing the scrap from said trimming-die, substantially as described, and for the purpose specified.

GEORGE DUNHAM.

Witnesses:

GEORGE E. Tara, THOMAS G. FLANAGAN.

IIO

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